Numerical analysis of free convective flows in partially open enclosure |
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Authors: | G Jilani S Jayaraj K Khadar |
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Institution: | (1) Department of Mechanical Engineering Calicut Regional Engineering College Calicut 673601, India E-mail: sjayaraj@crec.ker.nic.in, IN |
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Abstract: | Laminar steady state buoyancy induced flows in a two-dimensional, air filled partial open enclosure with a discrete flush
mounted iso-flux heat source on one of its walls is investigated numerically. The transport equations for energy and vorticity
are solved with the aid of the ADI finite difference scheme on uniform mesh. Because of the specific application of the present
study in the air cooling of electronic equipments, results are obtained only for a Prandtl number of 0.71 with an aspect ratio
of 1.0 for a range of Rayleigh numbers, Ra (≤105), heat flux parameter, Q and opening parameter, A
0 using constant properties and Boussinesq approximation by imposing approximate conditions at the opening. Results of flow
and temperature patterns, velocity and temperature profiles shows that the outgoing flow is governed by strong characteristics
of the cavity condition whereas the incoming flow influenced by outside conditions. It is observed that Rayleigh number considerably
affects the flow and thermal fields within the open enclosure when compared with intensity of heat flux and size of the opening.
Received on 22 January 2001 / Published online: 29 November 2001 |
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